This is one of my favorite hobbies to take part in.
I've got a hot glass shop on my farm in Kentucky (where I will make blanks and other artistic pieces), and I have built a cold shop with some tools (my favorite is a mold that uses pennies instead of the porcelain that they use in the article) and then using a HD projector and a DSLR that I remotely trigger, I get a map on the screen of where the imperfections are relative to the "top" of the mirror (that I indicate with a dot on the side).
Once I've worked the imperfections out, I'll then take it to an observatory in Ohio to get mirrorized -- and generally speaking, I'll donate my last telescope to the observatory (for public use) once I get the one I'm building done.
I've got a hot glass shop on my farm in Kentucky (where I will make blanks and other artistic pieces), and I have built a cold shop with some tools (my favorite is a mold that uses pennies instead of the porcelain that they use in the article) and then using a HD projector and a DSLR that I remotely trigger, I get a map on the screen of where the imperfections are relative to the "top" of the mirror (that I indicate with a dot on the side).
Once I've worked the imperfections out, I'll then take it to an observatory in Ohio to get mirrorized -- and generally speaking, I'll donate my last telescope to the observatory (for public use) once I get the one I'm building done.